/*
 * Copyright (C) 2009 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package cn.itguy.mobileguard.activity;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.MotionEvent;
import android.view.View.OnClickListener;
import android.gesture.GestureOverlayView;
import android.gesture.Gesture;
import android.gesture.GestureLibrary;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import java.io.File;

import cn.itguy.mobileguard.R;

public class CreateGestureActivity extends Activity {

	private static final float LENGTH_THRESHOLD = 120.0f;

	private EditText et_gesture_name;
	private View mDoneButton;

	private Gesture mGesture;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		setContentView(R.layout.create_gesture);

		((TextView) findViewById(R.id.tv_title)).setText(R.string.titleText_create_gesture);
		
		Button btn_left = (Button) findViewById(R.id.btn_left);
		btn_left.setVisibility(View.VISIBLE);
		btn_left.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {
				finish();
			}
		});
		
		et_gesture_name = (EditText) findViewById(R.id.gesture_name);
		mDoneButton = findViewById(R.id.done);

		GestureOverlayView overlay = (GestureOverlayView) findViewById(R.id.gestures_overlay);
		overlay.addOnGestureListener(new GesturesProcessor());
	}

	@Override
	protected void onSaveInstanceState(Bundle outState) {
		super.onSaveInstanceState(outState);

		if (mGesture != null) {
			outState.putParcelable("gesture", mGesture);
		}
	}

	@Override
	protected void onRestoreInstanceState(Bundle savedInstanceState) {
		super.onRestoreInstanceState(savedInstanceState);

		mGesture = savedInstanceState.getParcelable("gesture");
		if (mGesture != null) {
			final GestureOverlayView overlay = (GestureOverlayView) findViewById(R.id.gestures_overlay);
			overlay.post(new Runnable() {
				public void run() {
					overlay.setGesture(mGesture);
				}
			});

			mDoneButton.setEnabled(true);
		}
	}

	public void addGesture(View v) {
		if (mGesture != null) {
			final CharSequence name = et_gesture_name.getText();
			if (name.length() == 0) {
				et_gesture_name
						.setError(getString(R.string.error_missing_name));
				return;
			}

			final GestureLibrary store = GestureBuilderActivity.getStore();
			store.addGesture(name.toString(), mGesture);
			store.save();

			setResult(RESULT_OK);

			final String path = new File(getFilesDir(), "gestures")
					.getAbsolutePath();
			Toast.makeText(this, getString(R.string.save_success, path),
					Toast.LENGTH_LONG).show();
		} else {
			setResult(RESULT_CANCELED);
		}

		finish();
	}

	public void cancelGesture(View v) {
		setResult(RESULT_CANCELED);
		finish();
	}

	private class GesturesProcessor implements
			GestureOverlayView.OnGestureListener {
		public void onGestureStarted(GestureOverlayView overlay,
				MotionEvent event) {
			mDoneButton.setEnabled(false);
			mGesture = null;
		}

		public void onGesture(GestureOverlayView overlay, MotionEvent event) {
		}

		public void onGestureEnded(GestureOverlayView overlay, MotionEvent event) {
			mGesture = overlay.getGesture();
			if (mGesture.getLength() < LENGTH_THRESHOLD) {
				overlay.clear(false);
			}
			mDoneButton.setEnabled(true);
		}

		public void onGestureCancelled(GestureOverlayView overlay,
				MotionEvent event) {
		}
	}
}
